13 31 029 Checking Fuel Pump Delivery Pressure (N52K)

WARNING: This page is about a different variant/trim than selected.

Special tools required:

13 5 220
13 5 221
13 5 222

IMPORTANT: The fuel in the fuel lines is under pressure (approx. 5 bar)! Catch and dispose of escaping fuel.

Necessary preliminary tasks:

Switch off ignition
Remove acoustic cover and air filter housing on right

Remove dust cap (1).

Connect special tool kit 13 5 220 (comprising 13 5 221 and 13 5 222) to pressure sensor of DIS Tester.

Connect pressure sensor to DIS Tester.

Fig 1: Identifying Non-Return Valve On Special Tool (13 5 220)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not under any circumstances screw in the check valve up to the mechanical stop. This could damage the valve in the pressure regulator housing.

Mount special tool kit 13 5 220 to injection tube and tighten knurled nut hand-tight.

Screw out check valve (1) so that valve in pressure regulator housing is closed.

Start engine.

Screw in check valve (1) until a pressure reading is indicated on DIS Tester.

Measuring fuel pressure:

Select Measurement.
Multimeter function appears
Select Pressure test
Read off value of fuel pressure.

Compare actual value of test pressure with specified value. See FUEL SUPPLY SYSTEM - TECHNICAL DATA .

NOTE: Removing special tool kit 13 5 220:

Switch off engine.
Screw out check valve fully again.
Remove special tool kit 13 5 220 from pressure regulator housing.
Catch and dispose of escaping fuel.

NOTE: Read out fault memory of DME control unit. Check stored fault messages. Now clear the fault memory.

Fig 2: Identifying Special Tool (61 3 050)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Now clear the fault memory.